Pneumatic-tire valve.



w. c. HuNTooN. 1 PNEUMATIC TIRE VALVE. APPLICATION FILED FEB. I3. 1918.

" Patented Aug. 6, 1918.

useful WILLIAM C. HUNTOON, 0F PROVIDENCE, RHODE SLAND.

PNEUMATIC-TIRE VALVE.

Speclncatlon of Letten Patent.'

Patented Aug. 6, 1918.

Application flied February 13, 1918. Serial No. 217,011.

To all whom it may concern.'

Be. it known that I, WILLIAM C. 'HUN'mom a eitizen of the United States, residing at Providence, in the county of Providence and State of Rhode Island, have invented a new and useful Improvement in lneulmitie-Tire Valves, of which the following is a specifica tion. l

This invention relatee'to certain new and improvements in pneumatie tire, valves, and the primary object thereof is to provide a valve which l'ra'nn; a novel positive look against the escape of air,

Further, the invention aims to provide a device which een he simply sereived into the present valve stema= ot' tire valves, and which affords a double loelt For the ir hy providing two metal to metal jointe` Still further. the invention aims to previde a device of this t-,haraeter in which the tire may be inflated by simply turning one of the parts and in which the back pressure from within the tire, will hold the valve stem seated so as to prevent escape of' the air, the inom-ing air from the. pump being required to merely overcome the pressure of a light spring to permit of inflation of the tire.

ln 'the drawings-- Figure 1 is a vertical sectional vier; of the invention.

Figu 2 is an enlarged section on line of Fig. l.

Fig. il is a vier; similar te Fig modified form of the invention.

ln proceeding in accordance with the present invention, a sleeve l is employed having a valve seat 2 on its interior and being engaged at its top by a second sleeve 2l, the latter being exteriorly threadedat each of its ends and being held in rigid relation to thesleeve 1, by means of a eou pling member or nnt 4, the latter being threaded over the sleeve, 1. l

A valve stem 5 is formed with a lower valve which engages against the seatl 2 and passes through the sleeve 3. and atyits u'pper end is formed with a. second valve 7, a. guiding pin 12 extending ul'm-'ardly l'rom the, valve 7 as depleted in the, drawings, rlhe valve. 7 engages against or ou a valveseal 8 formed interiorly ol" a nat fh the lalt'erthreading over the upper threadsl of the. lsleeve Il. A spring l0,surrounds the valvel stem 5 and at, its upper ond abuts the luuler face otl the valve 7,

and at its lower end seats on an inwardly extending flange 11 formed on the lower end of the sleeve 3.

The guiding pin 12 extends through an opening 13 formed in the nut 95 the latter being exteriorly threaded at 14 toreceive the usual cap for closing the valve against the ingress of dirt, while the sleeve 1, is suitably threaded to engage within or with the usual threads et' a valve stem of common lorm and usage.

ln operation` the parts are normally in the position shown in the' drawings, in which the valves t3 and 7 are engaged with their outwardl \r and inwardly fatung seats :l and H resliertively. and are rigidly held in surh positions h v screwing the nnt 9 down to its` limit ot movement, which auses seat'H ot' the nut to engage the uppevalve 'i' and to force the stem with the latter downwardv tu efl'ect lirm seating of the valve ti on its 'seat 2. lVhen it is desired to inflate the tire. the nut 9 is turned to move outwardly or away from sleeve 3,

whit-h act-ion eauses spring 10 to move the stein 5 outwardly. thus moving valve 6 up from ita outwardly facing seat 2, bnt at the same time the valve 7 will be held by the spring against seat 8 dueto the latter tat-ing inwardly. and will be positively held hr the haelt pressure wit-hin the tire. `The air from the pump is thus required to merely overeonm the action of the light spring lll. and the. bark pressure in thetlre in order to unseat vulve 7 from its Seat 8 and to then pass through sleeves land 3 and enter the tire. t

The invention thus provides a double metal to metal lock against the escape of air when the parts are closed after Inflation. and during the latter provides a single loi-k tor preventing the air from-escaping The modification is similar in all material respon the 'preferred form, similar parts being identiiied by the same reference characters except that in the modification the characters are primed, and instead of employing a separate sleeve 3, the member 4' is formed with an integral sleeve or collar like extension 16, the latter threaded to roeeive the nnt 9.

Having thas described my invention,4 what/l' claim as new and desire to secure hv Letters Patent is l. In a. tire valve, a sleeve formed 'for attachment to the valve stem of an ordinary tire valve and having a valve seat on its interior, :L member secured eto the sleeve and having a bore und an inwardly extending flange .extending part-ly across the interior of the sleeve, e, stem having a valve engngeeble with. said valve seat and with said flange so as to be conned in its movements thereby, e second valve on the last named stem, e coil spring surrounding the last named stem and engaged with said second valve and with said flange, and e nut on said member having a seat for said second valve.

Q2. In a tire valve, a sleeve formed for attachment to the vulve stem of un ordinary tire valve and having a valve seat on it interior, a member secured to'the sleeve and having a bore, e spring tensioned stem having a valve engageeble with said seat means to restrict outward movement of Said last named stem, a second valve on the last named stem, and a nut on seid member operating independent of said restricting means and having a seat for said second valve.

In testimony whereof I have hereunto set my hand this TthLday of February, 1918.

WILLIAM C. H UN TOON .In presence of ADA E. HAGERTY, J. A. MILLER. 

